US5499511A - Heat pump type air conditioner for vehicle - Google Patents

Heat pump type air conditioner for vehicle Download PDF

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Publication number
US5499511A
US5499511A US08/423,847 US42384795A US5499511A US 5499511 A US5499511 A US 5499511A US 42384795 A US42384795 A US 42384795A US 5499511 A US5499511 A US 5499511A
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United States
Prior art keywords
compressor
changing
commanding
speed
refrigerant
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/423,847
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English (en)
Inventor
Junichiro Hara
Takayoshi Matsuoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Assigned to NISSAN MOTOR CO., LTD. reassignment NISSAN MOTOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HARA, JUNICHIRO, MATSUOKA, TAKAYOSHI
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00828—Ventilators, e.g. speed control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00899—Controlling the flow of liquid in a heat pump system
    • B60H1/00907—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant changes and an evaporator becomes condenser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3222—Cooling devices using compression characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H2001/00935—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising four way valves for controlling the fluid direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0253—Compressor control by controlling speed with variable speed

Definitions

  • the present invention relates to improvements in a vehicular heat-pump type air conditioner provided with a vapor compression refrigeration cycle, and more particularly to a heat pump type air conditioner having a compressor of a variable discharge capacity type.
  • the refrigerant discharge amount is changed by single changing rate (or changing speed). Accordingly, if the compressor is of a type which slowly changes the refrigerant discharge amount for protecting the compressor or keeping the stable operation of the refrigeration cycle, it is not easy for the passenger to recognize as to whether the refrigerant discharge amount is actually changed according to a command to the compressor such as start and stop commands and the switching of operation mode, or not.
  • FIG. 1 is a schematic view of a first embodiment of an air conditioner for a vehicle according to the present invention
  • FIG. 3 is a part of a flowchart which is applied to the control of the first embodiment of FIG. 1;
  • FIG. 5 is another part of the flowchart which is applied to the control of the first embodiment of FIG. 1;
  • FIG. 7 is a schematic view of a refrigeration cycle of the second embodiment where a refrigerant flow during each operation mode is indicated by arrows;
  • FIGS. 1 to 5 there is shown a first embodiment of a heat-pump type air conditioner according to the present invention.
  • the four-way valve 90 is switched as indicated by a solid line, as shown in FIG. 1. Accordingly, the refrigerant is circulated in the refrigeration cycle system as follows: the compressor 31 ⁇ the four-way valve 90 ⁇ the outer heat exchanger 38 ⁇ the expansion valve 34 ⁇ the outer heat exchanger 35 ⁇ the four-way valve 90 ⁇ the accumulator 91 ⁇ the compressor 31. Therefore, the heat of the refrigerant in the air conditioner is radiated through the outer heat exchanger 38, and the heat of the air flowing through the duct 39 is absorbed into the refrigerant through the inner heat exchanger 35. On the other hand, during a heating operation, the four-way valve 90 is switched at a position shown by a broken line.
  • the preset room temperature T ptc is set by the room temperature setting device 64 and is sent to the control unit 43. Such detected data function as the thermal information.
  • the outlet-port mode selecting switch 65 is arranged to set an outlet port mode for blowing out the conditioned air into the passenger compartment.
  • the outlet port mode includes a ventilating mode for mainly blowing out the air to an upper portion of front passengers, a foot mode for mainly blowing out the air to a foot portion of the passenger, a bi-level mode for blowing out the air to both of the upper portion and the foot portion of the passenger.
  • the blower fan switch 66 is disposed for selecting an air quantity of the blower fan 37.
  • the rotation speed of the compressor 31 is quickly changed and therefore the refrigerant discharge amount is quickly changed. If the rotation speed of the compressor 31 is quickly changed, the vehicle passenger can sense the change of the rotation speed from the change of sounds and vibrations (can recognize the change of the rotation speed). Further, it becomes possible to quickly obtain a desired air-conditioned state by quickly changing the rotation speed of the compressor 31. On the other hand, in case that the change rate (changing-speed) of the rotation speed of the compressor 31 is smaller than the predetermined value, since it is possible to quickly obtain the desired air-conditioned state even if the rotation speed of the compressor 31 is not quickly changed. Accordingly, in this case, the rotation speed of the compressor 31 is slowly changed upon taking account of the stability of the refrigeration cycle.
  • the routine proceeds to the step S523 wherein it is judged whether the operation mode is changed from a quick heating operation (first control mode) to a stable heating operation (second control mode) or not.
  • the quick heating operation is for quickly heating the passenger compartment by increasing the heating ability.
  • the stable heating operation is executed when the temperature in the passenger compartment generally reaches the set temperature. In case that the quick heating operation is executed, the rotation speed of the compressor 31 is set maximum while the freezing of the outer heat exchanger 38 is prevented. Accordingly, when the operation mode is transferred from the quick heating operation to the stable heating operation, the rotation speed of the compressor 31 is decreased.
  • the routine proceeds to a step S518.
  • the rotation speed of the compressor 31 is slowly changed if the changing-speed is slow or the operation mode is changed from the quick heating operation to the stable heating operation, and the rotation speed of the compressor 31 is quickly changed if the changed amount of the setting temperature to be changed by the temperature setting lever is larger than the predetermined value.
  • the refrigeration cycle of the second embodiment comprises a three-way valve 32 instead of the four-way valve 90 and a receiver 36 instead of the accumulator 91.
  • the receiver 36 is disposed upstream of the expansion valve 34.
  • a heat-radiating inner heat exchanger 33 is disposed upstream of the receiver 36.
  • the inner heat exchanger (heat-absorbing inner heat exchanger) 35 functions as a heat absorber in both of the cooling operation and the heating operation.
  • the three-way valve 32 is set as indicated by a solid line shown in FIG. 7. Accordingly, the refrigerant is circulated in the refrigeration cycle system as follows: the compressor 31 ⁇ the outer heat exchanger 38 ⁇ the heat-radiating inner heat exchanger 33 ⁇ the receiver 36 ⁇ the expansion valve 34 ⁇ the inner heat exchanger 35 ⁇ the compressor 31.
  • the outer heat exchanger 38 functions to radiate a heat of the refrigerant to the atmosphere
  • the inner heat exchanger 35 functions to generate cooled air by transferring the heat of conditioned air to the refrigerant.
  • the three way valve 32 is set as indicated by a broken line shown in FIG. 7. Accordingly, the refrigerant is circulated in the system as follows: the compressor 31 ⁇ the heat-radiating inner heat exchanger 33 ⁇ the receiver 36 ⁇ the expansion valve 34 ⁇ the inner heat exchanger 35 ⁇ the compressor 31.
  • the inner heat exchanger 35 functions to generate cooled air by transferring the heat of conditioned air to the refrigerant as similar to the cooling operation, and the inner heat exchanger 33 functions to generate warmed air by radiating the heat of the refrigerant to the cooler air.
  • An air mixing door 46 is disposed between the inner heat exchanger 33 and the heat-absorbing inner heat exchanger 35 in the duct 39.
  • the air mixing door 46 is driven by an air mixing door actuator (not shown) controlled by the control unit 43 so as to change the ratio of the air flow rates of cool air and warm air, wherein the cool air is air which bypasses the heat-radiating inner heat exchanger 33 and the warm air is the air which passes through the heat-radiating inner heat exchanger 33.
  • An opening degree X dsc of the air mixing door 46 is defined as follows: When the air mixing door 46 is located at a position indicated by a long and short dash line in FIG.
  • the opening degree X dsc is defined as 0% (full close condition).
  • the opening degree X dsc is defined as 100% (full open condition).
  • an air mixing chamber 47 is disposed downstream of the heat-radiating inner heat exchanger 33 in the duct 39. Furthermore, in addition to the sensors equipped in the first embodiment, a refrigerant temperature sensor 67 is connected with the control unit 43 and detects a refrigerant outlet temperature T d of the heat-radiating inner heat exchanger 33. An air outlet temperature sensor 68 is connected with the control unit 43 and detects an outlet air temperature T v of the heat-radiating inner heat exchanger 33.
  • FIG. 8 shows a flowchart corresponding to a part of the flowcharts in FIG. 4.
  • steps similar to those in FIG. 4 are designated by the same reference numerals.
  • the steps S517 to S521 are similarly executed as in the first embodiment.
  • the rotation speed of the compressor 31 is changed in a step S533. Since the changing-speed flag has been set at 1, the rotation speed of the compressor 31 is quickly changed. Accordingly, the passenger can certainly recognize the change of the rotation speed of the compressor 31 which is executed according to the change of the blower fan speed.
  • step S601 When the answer of the step S601 is "NO", the routine proceeds to the step S522 wherein it is judged whether the difference (deviation) between the previous and present rotation speed is larger than the predetermined value or not. That is, it is judged whether the change rate of the rotation speed is larger than the predetermined value or not.
  • step S522 When the answer of the step S522 is "NO”, the routine proceeds to the step S525 wherein the changing-speed flag is set at 0. Following this, the routine proceeds to the step S530.
  • the routine proceeds to the step S523 wherein it is judged whether the operation mode is changed from the quick heating operation (first control mode) to the stable heating operation (second control mode) or not.
  • the quick heating operation is for quickly heating the passenger compartment by increasing the heating ability.
  • the stable heating operation is executed when the temperature in the passenger compartment generally reaches the set temperature. In case that the quick heating operation is executed, the rotation speed of the compressor 31 is set maximum while the freezing of the outer heat exchanger 38 is prevented. Accordingly, when the operation mode is transferred from the quick heating operation to the stable heating operation, the rotation speed of the compressor 31 is decreased.
  • step S523 When the answer of the step S523 is "YES", it is judged that it is not necessary to inform the change of the rotation speed to the passenger since the change of the rotation speed of the compressor 31 is not executed by the passenger. Accordingly, the routine proceeds to a step S525 wherein the changing-speed of the rotation speed is set at 1. By slowly changing the rotation speed of the compressor, it becomes possible to suppress the unstable operation of the refrigeration cycle.
  • step S602 When the answer of the step S602 is "YES”, the routine proceeds to the step S529 wherein the changing-speed flag is set at 0 in order to slowly change the rotation speed of the compressor 31. On the other hand, when the answer of the step S527 is "NO”, the routine proceeds to the step S529.
  • the change of the rotation speed of the compressor 31 is executed in order to adequately control the temperature and the pressure in the refrigeration cycle, but not executed by the passenger. Accordingly, it is not necessary to inform the change of the rotation speed of the compressor 31. Therefore, the rotation speed is slowly changed in order to prevent the change of the rotation speed from degrading the stabitity of the refrigeration cycle.
  • the other control of the second embodiment is similar to that of the first embodiment. Therefore, the explanation thereof is omitted herein.
  • FIG. 10 there is shown a third embodiment of the air conditioner according to the present invention.
  • the construction of the third embodiment is the same as that of the second embodiment shown in FIG. 6.
  • FIG. 10 shows a flowchart corresponding to the flowchart of FIG. 5.
  • the same reference numerals designate the same steps as those in the flowchart shown in FIG. 5.
  • the routine proceeds to a step S701 wherein it is judged whether the sensors make trouble or not.
  • the judgement is executed by previously setting an allowable range of the detection value of each sensor and by judging whether the actual detection value is within the allowable range or not.
  • the routine jumps to a step S703.
  • the routine proceeds to a step S702 wherein the changing-speed flag is set at 1.
  • the routine proceeds to the step S703 wherein it is judged whether the refrigerant temperature from the compressor 31 is higher than or equal to a first predetermined value such as 100° to 120° C.
  • a first predetermined value such as 100° to 120° C.
  • the routine proceeds to a step S535 wherein the air conditioner is stopped in order to prevent the air conditioner from going wrong. In this operation, the rotation speed of the compressor 31 is quickly lowered.
  • the routine proceeds to a step S704 wherein it is judged whether the refrigerant temperature from the compressor 31 is higher than or equal to a second predetermined value such as 90° to 95° C.
  • step S704 When the answer of the step S704 is "NO”, the routine jumps to a step S533.
  • the routine proceeds to a step S705 wherein the rotation speed of the compressor 31 is quickly decreased by a predetermined amount such as about 30% of the maximum rotation speed. Then, the routine proceeds to the step S533.
  • the control of the third embodiment may be executed by substituting the refrigerant temperature by a refrigerant pressure.
  • step S533 the rotation speed of the compressor 31 is set.
  • the rotation speed is kept at a present speed.
  • the rotation speed is changed to correspond with a commanded rotation speed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
US08/423,847 1994-04-19 1995-04-18 Heat pump type air conditioner for vehicle Expired - Lifetime US5499511A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6-080626 1994-04-19
JP08062694A JP3587548B2 (ja) 1994-04-19 1994-04-19 車両用ヒートポンプ式冷暖房装置

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5899086A (en) * 1996-09-06 1999-05-04 Calsonic Corporation Heat pump type air conditioning system for automotive vehicle
EP0913281A1 (en) 1997-10-30 1999-05-06 Calsonic Corporation Vehicular air conditioning apparatus
US5910157A (en) * 1997-06-30 1999-06-08 Calsonic Corporation Automotive air conditioning system
US5975191A (en) * 1996-09-25 1999-11-02 Calsonic Corporation Vehicle air conditioner
US6109046A (en) * 1996-11-12 2000-08-29 Valeo Climatisation Air conditioning apparatus for a vehicle with a heating loop including a variable output compressor
US6125643A (en) * 1996-11-15 2000-10-03 Calsonic Corporation Heat pump type air conditioning system for automotive vehicle
US6148632A (en) * 1997-07-31 2000-11-21 Denso Corporation Refrigeration cycle apparatus
GB2356926A (en) * 1999-11-30 2001-06-06 Delphi Tech Inc Air conditioning system for a motor vehicle with electronically controlled variable stroke compressor
EP1078787A3 (en) * 1999-08-20 2002-08-21 Delphi Technologies, Inc. Air conditioning system for a motor vehicle
EP1078788A3 (en) * 1999-08-20 2002-08-21 Delphi Technologies, Inc. Air conditioning system for a motor vehicle
US6468512B1 (en) 2000-11-22 2002-10-22 Avon Products, Inc. Gel compositions
US20050160747A1 (en) * 2004-01-23 2005-07-28 Shinichi Kaga Operation control device for cooling apparatus
US20060204368A1 (en) * 2005-03-11 2006-09-14 Tomonori Imai Air conditioning systems for vehicles
EP1726461A1 (en) * 2004-03-17 2006-11-29 Calsonic Kansei Corporation Air conditioner for vehicle
WO2011160777A1 (de) * 2010-06-23 2011-12-29 Audi Ag Vorrichtung zur klimatisierung von fahrzeugen
US20150027144A1 (en) * 2013-07-29 2015-01-29 Samsung Electronics Co., Ltd. Air conditioner and control method thereof
EP3715740A1 (en) * 2019-03-29 2020-09-30 Mitsubishi Electric R&D Centre Europe B.V. Method, heat pump system and hvac system

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US4667480A (en) * 1986-09-22 1987-05-26 General Electric Company Method and apparatus for controlling an electrically driven automotive air conditioner
JPH01296056A (ja) * 1988-05-19 1989-11-29 Nippon Denso Co Ltd ヒートポンプ式冷暖房装置
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JPH02290475A (ja) * 1989-04-28 1990-11-30 Nippondenso Co Ltd ヒートポンプ式冷暖房装置
US5316074A (en) * 1990-10-12 1994-05-31 Nippondenso Co., Ltd. Automotive hair conditioner

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US4667480A (en) * 1986-09-22 1987-05-26 General Electric Company Method and apparatus for controlling an electrically driven automotive air conditioner
JPH01296056A (ja) * 1988-05-19 1989-11-29 Nippon Denso Co Ltd ヒートポンプ式冷暖房装置
US4907416A (en) * 1988-06-21 1990-03-13 Diesel Kiki Co., Ltd. Air-conditioner for automobiles
JPH02290475A (ja) * 1989-04-28 1990-11-30 Nippondenso Co Ltd ヒートポンプ式冷暖房装置
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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5899086A (en) * 1996-09-06 1999-05-04 Calsonic Corporation Heat pump type air conditioning system for automotive vehicle
US5975191A (en) * 1996-09-25 1999-11-02 Calsonic Corporation Vehicle air conditioner
US6109046A (en) * 1996-11-12 2000-08-29 Valeo Climatisation Air conditioning apparatus for a vehicle with a heating loop including a variable output compressor
US6125643A (en) * 1996-11-15 2000-10-03 Calsonic Corporation Heat pump type air conditioning system for automotive vehicle
US6230505B1 (en) 1996-11-15 2001-05-15 Calsonic Kansei Corporation Heat pump type air conditioning system for automotive vehicle
US5910157A (en) * 1997-06-30 1999-06-08 Calsonic Corporation Automotive air conditioning system
US6148632A (en) * 1997-07-31 2000-11-21 Denso Corporation Refrigeration cycle apparatus
EP1262348A3 (en) * 1997-07-31 2003-01-02 Denso Corporation Refrigeration cycle apparatus
EP0894651A3 (en) * 1997-07-31 2001-08-16 Denso Corporation Refrigeration cycle apparatus
US6332496B1 (en) 1997-07-31 2001-12-25 Denso Corporation Refrigeration cycle apparatus
EP0913281A1 (en) 1997-10-30 1999-05-06 Calsonic Corporation Vehicular air conditioning apparatus
US6105666A (en) * 1997-10-30 2000-08-22 Calsonic Corporation Vehicular air conditioning apparatus
EP1078787A3 (en) * 1999-08-20 2002-08-21 Delphi Technologies, Inc. Air conditioning system for a motor vehicle
EP1078788A3 (en) * 1999-08-20 2002-08-21 Delphi Technologies, Inc. Air conditioning system for a motor vehicle
GB2356926A (en) * 1999-11-30 2001-06-06 Delphi Tech Inc Air conditioning system for a motor vehicle with electronically controlled variable stroke compressor
US6468512B1 (en) 2000-11-22 2002-10-22 Avon Products, Inc. Gel compositions
US20050160747A1 (en) * 2004-01-23 2005-07-28 Shinichi Kaga Operation control device for cooling apparatus
US6931872B2 (en) * 2004-01-23 2005-08-23 Hoshizaki Denki Kabuski Kaisha Operation control device for cooling apparatus
EP1726461A1 (en) * 2004-03-17 2006-11-29 Calsonic Kansei Corporation Air conditioner for vehicle
US20080229768A1 (en) * 2004-03-17 2008-09-25 Calsonic Kansei Corporation Air Conditioner for Vehicle
EP1726461A4 (en) * 2004-03-17 2009-04-01 Calsonic Kansei Corp AIR CONDITIONER FOR VEHICLES
US20060204368A1 (en) * 2005-03-11 2006-09-14 Tomonori Imai Air conditioning systems for vehicles
WO2011160777A1 (de) * 2010-06-23 2011-12-29 Audi Ag Vorrichtung zur klimatisierung von fahrzeugen
US20150027144A1 (en) * 2013-07-29 2015-01-29 Samsung Electronics Co., Ltd. Air conditioner and control method thereof
US9945599B2 (en) * 2013-07-29 2018-04-17 Samsung Electronics Co., Ltd. Air conditioner and control method thereof
EP3715740A1 (en) * 2019-03-29 2020-09-30 Mitsubishi Electric R&D Centre Europe B.V. Method, heat pump system and hvac system
CN111750460A (zh) * 2019-03-29 2020-10-09 三菱电机株式会社 用于操作热泵***的方法、热泵***及供暖、通风与空气调节***

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JP3587548B2 (ja) 2004-11-10
JPH07285324A (ja) 1995-10-31

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